Effects of ionic crosslinking on physical and mechanical properties of alginate mulching films

被引：127
|
作者：
Guo Liling [1 ]
Zheng Di [1 ]
Xu Jiachao [1 ]
Gao Xin [1 ]
Fu Xiaoting [1 ]
Zhang Qing [2 ]
机构：
[1] Ocean Univ China, Coll Food Sci & Engn, Qingdao 266003, Shandong, Peoples R China
[2] Qingdao Singtie Ocean Biotechnol Co Ltd, Qingdao 266019, Shandong, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2016年 / 136卷
关键词：
Alginate; Ionic crosslinking; Agricultural mulching film; Biodegradation; Radiometric properties; BIODEGRADABLE FILMS; PLASTICIZER; GELATION;
D O I：
10.1016/j.carbpol.2015.09.034
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The effect of different ionic cros slinking parameters on the thickness, radiometric profiles, and mechanical and water vapor permeation (WVP) properties of alginate mulching films was investigated. Crosslinking by Mn2+, Zn2+, and Ca2+ (but not Al3+) increased the tensile strength and light transmission and decreased the WVP of the films. Among the films, those crosslinked by Ca2+ had the greatest tensile strength and exhibited the highest elongation and light transmission. Furthermore, the WVP and light transmission decreased gradually with increasing Ca2+ concentration, and the maximum tensile strength and elongation were obtained for 2% (w/v) of Ca2+. However, the WVP of the films increased gradually with increasing crosslinking time, and the elongation saturated after 2 min. These results suggest that alginate films crosslinked by 2% (w/v) calcium chloride for 2 min had the best overall performance and therefore have the potential to be used as entirely biodegradable agricultural mulching films. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：259 / 265
页数：7
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